Physics Questions

According to the exercise principle of balance, a workout should __________.a. address all components of fitness b. focus on balance and coordination c. target specific areas for improvement d. vary exercise activities over time
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Sunlight is a form of energy called _____. electromagnetic energy nuclear energy hydro energy magnetic energy
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Coal _____. is a renewable resource can easily be replenished is formed from plant remains is the least-polluting energy source
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Which of the following answers describes Kepler's laws?a. Planets orbit in elliptical patterns; the bigger the planet, the more gravitational pull; a planet's gravitational pull is stronger or weaker depending on its distance from the Sun.b. A planet's orbit covers equal distances in equal amounts of time; the speed of a planet's orbit depends on its distance from the Sun; the bigger the planet, the slower it moves.c. Planets orbit in elliptical patterns; a planet's orbit covers equal areas in equal amounts of time; planets' orbits are shorter or longer depending on their distance from the Sun.
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In a stringed musical instrument, the sound frequency of a particular string can be increased by A. tightening the string.B. increasing the string's thickness.C. loosening the string.D. lengthening the string.
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The change in pitch of a train's horn as it passes while you are standing still can be explained by A. the Doppler effect. B. ultrasonic vibrations. C. sympathetic vibration. D. resonance.
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What is the formula for calculating density?A. density=mass/volumeB. density=mass*volumeC. density=volume/massD. density=mass + volume
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The state of matter with a specific volume but no definite shape is the _____ state. plasmagasliquidsolid
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Which scientist first made a model of the atom called the plum pudding model?John DaltonJ.J. ThomsonErnest RutherfordNeils Bohr
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Based on the principles of convection, conduction and thermal radiation, which scenario below is most similar to the following situation?Heat traveling through the ceiling from your bedroom to the attic.A) Feeling a metal wire get warmer as you roast a marshmallow over a fire. B) Warm air rising in a room where the air is moving. C) The sun warming up the roof on a house. D) Cold water sinking in a pot of water being warmed up on the stove.
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Which describes the changes in visible light moving from red to violet?
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The calcium carbonate found in limestone was originally extracted from _______.a. seawaterb. shalec. magmad. silt
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The four terrestrial planets that have solid, rocky surfaces are A. Mars, Venus, Earth, and Jupiter. B. Mercury, Jupiter, Saturn, and Mars. C. Mercury, Venus, Jupiter, and Mars. D. Mercury, Venus, Earth, and Mars
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Water is made of two hydrogen atoms and one oxygen atom bonded together. Julia is describing how water undergoes a physical change when it boils. She says that the particles shift to be farther apart and that the oxygen and hydrogen separate. She also says that the total mass of the steam is the same as the initial water, and that heat energy was required to cause the change. She finishes her description by saying that the steam can be turned back into water if it is cooled.what was her mistake?
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The Moon is made up of minerals similar to those on Earth, which areA. rilles.B. lunar breccias.C. silicates.D. highlands.
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Anita is running to the right at 5 m/s , as shown in (Figure 1) . Balls 1 and 2 are thrown toward her by friends standing on the ground. According to Anita, both balls are approaching her at 16 m/s .According to her friends, with what speed was ball 1 thrown? According to her friends, with what speed was ball 2 thrown?
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A car travels from boston
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Anthony walks to the pizza place for lunch. he walk 1 km east, then 1 km south and then 1 km east again. what distance did he cover? what was his displacement?
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